Will Original temp gauge work with big block?

johnnymac2k6 said

Yes, just move the sender from one engine to the other and off you go. however the stock gauges aren't super accurate...so may want to consider an aftermarket gauge (even if you mount it way down on the dash by the trans hump) so you keep a clean interior.

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Totally agree, I did the swap and the factory gauge is way lower than my after market one. I just put a second sender into an adapter that goes into the rad hose ans kept the stock one in the block. Works good for me. If I ever take the pump out again I plan an drilling and tapping the wp housing for the second sender.